Question

在非工作时间，DB进入理想状态，所以我再次重新连接数据库，如下所示：

执行数据库查询时出现以下错误：

{ ＆＃34;状态＆＃34;：500，＆＃34;错误＆＃34;：{ ＆＃34;代码＆＃34;：＆＃34; PROTOCOL_ENQUEUE_AFTER_FATAL_ERROR＆＃34;，＆＃34;致命＆＃34;：假 } }

var mysql = require('mysql');
var settings = require('./config.js');

var connection;

function handleDisconnect() {

connection = mysql.createConnection({
    host: settings.dbhost,
    user: settings.user,
    password: settings.password,
    database: settings.database
});

connection.connect(function (err) {
    if (err) {
        console.log('Error when connecting to db:', err, settings.database);
        setTimeout(handleDisconnect, 2000);
    }
    else {
        console.log("Database is connected ...", settings.database);
    }
});

connection.on('error', function (err) {
    console.log('db error', err, settings.database);
    if (err.code === 'PROTOCOL_CONNECTION_LOST') {

        connection
        handleDisconnect();
    } else {
        throw err;
    }
});
}

handleDisconnect();

module.exports = connection;

Answer 1

一种可能但不完善的解决方案是使用sql.ConnectionPool()

获取错误PROTOCOL_ENQUEUE_AFTER_FATAL_ERROR

1 个答案: